Older Nice quality finder with illuminated reticle 1-1/4 eyepiece and prism diagonal.Eyepiece can be removed and used for astrophoto guiding also.The eyepiece is not labeled but appears to be about a 18mm ortho or kellner with built-in helical focuser. This came with the Super C-8's years ago.The battery is currently dead due to my leaving it on.It is a Toshiba MR-9 2.7 volt battery which will have to be replaced.Also comes with a dovetail bracket that will fit a C-8 or a C-11.This is not a cheap Chinese piece of ----! In very good condition.$100+ship